Some of the information from the Post Offices and Postmaster database is online, but they don't make it easy to find. Here's the relevant
page, and the answer is Theodore Vautour.
To get this result, here's what I did:
1. Go to
Collection Search.
2. Select "Advanced Search".
3. Enter the search term, select "Post Offices and Postmasters" from the Database dropdown, hit Search
4. Select the Richibucto result.
5. Click "Record Information – Details" to see the detailed results.